Syntax error when trying to start rails server

I'm recently began working on a project which I've cloned from github. Everytime I try start the rails server I get the following error: ``` /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:245:in load': /Users/thomas/Projects/BillingMiddleware/config/initializers/session_store.rb:3: syntax error, unexpected ':', expecting $end (SyntaxError) ...sion_store :cookie_store, key: '_BillingMiddleware_session' ^ from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:245:inload' from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:236:in load_dependency' from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:245:inload' from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.3/lib/rails/engine.rb:588 from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.3/lib/rails/engine.rb:587:in each' from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.3/lib/rails/engine.rb:587 from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.3/lib/rails/initializable.rb:30:ininstance_exec' from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.3/lib/rails/initializable.rb:30:in run' from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.3/lib/rails/initializable.rb:55:inrun_initializers' from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.3/lib/rails/initializable.rb:54:in each' from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.3/lib/rails/initializable.rb:54:inrun_initializers' from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.3/lib/rails/application.rb:136:in initialize!' from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.3/lib/rails/railtie/configurable.rb:30:insend' from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.3/lib/rails/railtie/configurable.rb:30:in method_missing' from /Users/thomas/Projects/BillingMiddleware/config/environment.rb:5 from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:251:inrequire' from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:251:in require' from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:236:inload_dependency' from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:251:in require' from /Users/thomas/Projects/BillingMiddleware/config.ru:4 from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/rack-1.4.1/lib/rack/builder.rb:51:ininstance_eval' from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/rack-1.4.1/lib/rack/builder.rb:51:in initialize' from /Users/thomas/Projects/BillingMiddleware/config.ru:1:innew' from /Users/thomas/Projects/BillingMiddleware/config.ru:1 ``` My collegue is also working on the project and doesn't seem to have any problems starting the server. He is running the same version of ruby, rails and WeBrick as me. I've tried changing the syntax from key: to :key =>, this shouldn't be the problem though as I am running ruby version 1.9.3. If I make that change anyhow I get a different error message: ``` /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:245:in `load': /Users/thomas/Projects/BillingMiddleware/config/initializers/wrap_parameters.rb:8: syntax error, unexpected ':', expecting kEND (SyntaxError) wrap_parameters format: [:json] ^ from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:245:in `load' from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:236:in `load_dependency' from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:245:in `load' from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.3/lib/rails/engine.rb:588 from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.3/lib/rails/engine.rb:587:in `each' from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.3/lib/rails/engine.rb:587 from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.3/lib/rails/initializable.rb:30:in `instance_exec' from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.3/lib/rails/initializable.rb:30:in `run' from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.3/lib/rails/initializable.rb:55:in `run_initializers' from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.3/lib/rails/initializable.rb:54:in `each' from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.3/lib/rails/initializable.rb:54:in `run_initializers' from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.3/lib/rails/application.rb:136:in `initialize!' from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.3/lib/rails/railtie/configurable.rb:30:in `send' from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/railties-3.2.3/lib/rails/railtie/configurable.rb:30:in `method_missing' from /Users/thomas/Projects/BillingMiddleware/config/environment.rb:5 from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:251:in `require' from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:251:in `require' from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:236:in `load_dependency' from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/activesupport-3.2.3/lib/active_support/dependencies.rb:251:in `require' from /Users/thomas/Projects/BillingMiddleware/config.ru:4 from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/rack-1.4.1/lib/rack/builder.rb:51:in `instance_eval' from /Users/thomas/.rvm/gems/ruby-1.9.3-p194/gems/rack-1.4.1/lib/rack/builder.rb:51:in `initialize' from /Users/thomas/Projects/BillingMiddleware/config.ru:1:in `new' from /Users/thomas/Projects/BillingMiddleware/config.ru:1 ``` I've tired completely removing and re-installing rvm, ruby and rails several times to no prevail. I’ve also tried running bundle install which hasn’t help. Does anyone have any idea of what’s going wrong? Thanks